1.1 --- a/src/cpu/x86/vm/vm_version_x86.cpp Thu Aug 28 14:05:08 2014 -0700
1.2 +++ b/src/cpu/x86/vm/vm_version_x86.cpp Fri Aug 22 12:03:49 2014 -0700
1.3 @@ -612,6 +612,17 @@
1.4
1.5 #if INCLUDE_RTM_OPT
1.6 if (UseRTMLocking) {
1.7 + if (is_intel_family_core()) {
1.8 + if ((_model == CPU_MODEL_HASWELL_E3) ||
1.9 + (_model == CPU_MODEL_HASWELL_E7 && _stepping < 3) ||
1.10 + (_model == CPU_MODEL_BROADWELL && _stepping < 4)) {
1.11 + if (!UnlockExperimentalVMOptions) {
1.12 + vm_exit_during_initialization("UseRTMLocking is only available as experimental option on this platform. It must be enabled via -XX:+UnlockExperimentalVMOptions flag.");
1.13 + } else {
1.14 + warning("UseRTMLocking is only available as experimental option on this platform.");
1.15 + }
1.16 + }
1.17 + }
1.18 if (!FLAG_IS_CMDLINE(UseRTMLocking)) {
1.19 // RTM locking should be used only for applications with
1.20 // high lock contention. For now we do not use it by default.
